Waymo suspended its robotaxi service in San Francisco on Saturday evening after a massive blackout appeared to leave many of its vehicles stalled on city streets. Numerous photos and videos posted to social media captured Waymo robotaxis stalled at roads and intersections as human drivers were either stuck behind them or weaved around them.The blackout also took down many of the city’s traffic lights and affected Muni mass transit, with San Francisco Mayor Daniel Lurie warning residents to stay off the roads unless they needed to travel. How safe are the robotaxis

